Attach message metadata using OPT
01OPT is a pseudo-record in the Additional section, not ordinary zone data.
Related RFCs and changes
“Updates” changes part of an earlier RFC. “Obsoletes” replaces it. This list shows selected related documents.
DIAGRAM§ 6.1.1 ↗
RFC 6891 · § 6.1.1EXAMPLE
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03
Interpret its fields as message capabilities, not an address record.
Interpret its fields as message capabilities, not an address record.
Protocol participantThreat or exceptionProtocol controlSimplified drawings · precise section references
Read the updated RFC section ↗
A message contains at most one OPT record.
- A message contains at most one OPT record.
- OPT has a root owner name, type 41, fixed metadata, and variable options.
The drawing is a simplified worked example. Follow the linked RFC and its updates for implementation requirements.
Read the RFC section ↗Diagrams simplify the RFC. Read the linked sections for complete requirements.
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